JP2987648B2 - Silver halide photographic material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic material having high sensitivity, excellent gradation characteristics, and improved sharpness.

[0002]

2. Description of the Related Art In recent years, with the spread of silver halide photographic light-sensitive materials, there has been a demand for high-sensitivity light-sensitive materials suitable for rapid processing, and there has been a continuing demand for improvement in finished quality. In rapid processing, it is well known about the high development speed of halide emulsions containing silver halide grains consisting essentially of AgCl. The effect is even greater if the emulsion is a monodisperse emulsion. However, it is well known in the art that the monodispersibility is improved and the shadow reproducibility is deteriorated in gradation reproduction. In order to solve this problem, for example, JP-A-62-5234, JP-A-62-172348,
JP-A-59-148049, JP-A-63-71838
JP-A-1-101542 discloses that silver halide emulsions having different sensitivities by changing the particle size, crystal habit, composition and the like of silver halide grains are mixed and improved.
However, in these methods, the tone reproducibility is improved, but sharpness, which is important as image quality characteristics, is deteriorated.
On the other hand, it is known to use an anti-irradiation dye as a method for improving sharpness, but this is not preferable because sensitivity is reduced and streaks of residual color occur. Also, Japanese Patent Application Laid-Open No. 2-2
No. 8640 discloses that the sharpness is slightly improved when a silver halide emulsion is coated on a support made of paper coated with a polyolefin resin layer and containing 13% by weight of a white pigment in the polyolefin resin layer. Although it was seen, no effect was seen at all in the shadow depiction in tone reproduction.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a silver halide photographic light-sensitive material which solves the above-mentioned problems of the prior art, has high sensitivity, excellent gradation reproducibility and sharpness, and is suitable for rapid processing. To provide.

[0004]

SUMMARY OF THE INVENTION An object of the present invention comprises a paper substrate and a polyolefin resin coating layer covering both sides of the paper substrate. In the layer to which the emulsion layer is applied, white pigment particles are contained in the polyolefin resin layer at a density of 13% by weight or more, and the surface of the layer is 0.14% or more.
having a center plane average roughness (SRa) of at most μm, wherein SRa is calculated by the following formula (I), and at least one layer on the support contains 90 mol% or more of silver chloride;
And two or more monodispersed silver halide emulsions having different sensitivities, and the sensitivity difference between the emulsions is 0.05 to 0.6 logE.
It was achieved by a silver halide photographic light-sensitive material, characterized in that. Formula [I]

[0005]

(Equation 2) Wherein, Lx represents a X-axis direction length of the sample surface area, Ly represents the Y-axis direction length of the sample surface area, S _M represents the area of the sample surface area. ]

The substrate made of the paper of the present invention can be selected from raw materials generally used for photographic printing paper. Examples include natural pulp, synthetic pulp, a mixture of natural pulp and synthetic pulp, and various raw materials for laminated paper. Generally, natural pulp mainly composed of softwood pulp, hardwood pulp, and a mixture of softwood pulp and hardwood pulp can be widely used.

The surface of the pulp may be treated with a film-forming polymer such as gelatin, starch, carboxymethylcellulose, polyacrylamide, polyvinyl alcohol, or a modified polyvinyl alcohol. In this case, examples of the modified polyvinyl alcohol include a modified carboxyl group, a modified silanol, and a copolymer with acrylamide. Further, when the surface sizing is performed with the film-forming polymer, the coating amount of the film-forming polymer is adjusted to 0.1 to 5.0 g / m ^2, preferably 0.5 to 2.0 g / m ² . Further, an antistatic agent, a fluorescent whitening agent, a pigment, an antifoaming agent, and the like can be added to the film-forming polymer at this time, if necessary.

[0008] Further, a paper substrate is prepared by subjecting a pulp slurry containing the above-mentioned pulp and, if necessary, additives such as a salt amount, a sizing agent, a paper strength reinforcing agent and a fixing agent to a paper machine such as a fourdrinier paper machine. And dried and wound up. The surface sizing is performed before or after the drying, and a calendering is performed between the drying and the winding. When the surface sizing treatment is performed after drying, the calendering treatment can be performed before or after the surface sizing treatment.

As the white pigment of the present invention, inorganic and / or organic white pigments can be used, preferably inorganic white pigments, such as alkaline earth metal sulfates such as barium sulfate. And alkaline earth metal carbonates such as calcium carbonate, finely divided silica, silica as synthetic silicate, calcium silicate, alumina, alumina hydrate, titanium oxide, zinc oxide, talc, clay and the like. Of these, barium sulfate, calcium carbonate, and titanium oxide are preferred, and barium sulfate is more preferred.
Titanium oxide, and more preferably barium sulfate and titanium oxide. Titanium oxide may be of rutile type or anatase type, and one whose surface is coated with a metal oxide such as hydrous alumina or hydrous ferrite is also used.

The white pigment of the present invention is added to the polyolefin resin layer on the emulsion layer side and is preferably contained at a density of 13% by weight or more, particularly preferably at a density of 13 to 50% by weight. Is preferred. The white pigment is fine particles and is preferably densely and uniformly dispersed in the polyolefin resin layer.

The polyolefin resin used in the present invention can be selected from copolymers of α-olefins such as polyethylene and polypropylene, and mixtures of homopolymers thereof. Particularly preferred are low density polyethylene, high density polyethylene and mixtures thereof. Although the molecular weight of the polyolefin resin is not particularly limited, it is usually 2,000.
It may be in the range of 0 to 200,000. The thickness of the resin layer is 5 to 200 μm, particularly preferably 30 to 100 μm. Usually, a white pigment is kneaded by a melt-mixing method or the like, and the mixture is melt-extruded through a melt extruder and laminated.

Further, for example, JP-A-57-27257,
As described in the specifications of JP-A-57-49946 and JP-A-61-262538, one polymerizable carbon-carbon double bond is used.
Unsaturated organic compounds having one or more in the molecule, for example, methacrylate compounds, JP-A-61-262738
Gintree or tetraacrylate represented by the general formula in the specification can be used. In this case, after being applied on the substrate, it is cured by electron beam irradiation to form a polyolefin resin layer. White pigments and the like are dispersed in the unsaturated organic compound. Further, other resins can be mixed and dispersed.

The method for applying the polyolefin resin layer of the present invention includes, for example, a lamination method described in, for example, "New Laminating Handbook" of Processing Technology Research Association, for example, dry lamination, solventless dry lamination, and the like. For the coating, a gravure roll type, a wire bar type, a doctor blade type, a reverse roll type, a dip type, an air knife type, a calendar type, a kiss type, and the like are used.

The substrate made of the paper according to the present invention is three-dimensionally measured for the surface roughness of the substrate covered with the polyolefin resin layer by a stylus type surface roughness measuring instrument, and the surface roughness is obtained from the obtained roughness curve. , Extract a test surface area of area SA on the center plane,
The rectangular coordinate axis, X,
Axis, the Y axis, and the axis perpendicular to the center plane is the Z axis,
When the roughness surface is represented by Z = f (x, y), it was found that the value of the center plane average roughness (SRa) given by the following equation [I] is preferably smaller than 0.14 μm. Formula [I]

[0015]

(Equation 3) Wherein, Lx represents a X-axis direction length of the sample surface area, Ly represents the Y-axis direction length of the sample surface area, S _M represents the area of the sample surface area.

This measurement method is set according to JIS-B0601, which specifies measurement of a two-dimensional plane, and is applied to a three-dimensional space. As a measuring instrument, for example, it can be analyzed by a stylus type surface roughness analyzer SE-30H manufactured by Kosaka Laboratory. The most important point in this measurement method is the setting of the area of the test surface area. The area surrounded by the length in the X-axis direction 5 mm and the length in the Y-axis direction 1 mm is used, and the cutoff value is 0.8 mm. Is preferred. It corresponds to the center plane average roughness (SRa) obtained by adopting such an area of the test surface area, sharpness and fog resistance during storage over time. When SRa is larger than 0.14 μm, sharpness is obtained. Not acceptable for fog resistance. The smaller the value of SRa is, the more preferable it is, and the range of 0.05 to 0.14 μm is most preferable.

According to the present invention, the center plane average roughness (SRa) is 0.1.
The method for producing a photographic support having a polyolefin resin film thickness of 14 μm or less can be achieved by employing the following production methods alone or in combination in the production of base paper for paper base and the processing of the polyolefin film. However, it is not limited to them. In the production of base paper for a paper substrate, (1) softwood pulp is blended in an amount of 40% or less and hardwood pulp is incorporated in an amount of 60% or more in the composition of the pulp to be used. The pulp used is beaten to a Canadian standard freeness in the range of 200-300 ml. (2) The flow rate of the stock in the inlet is 0.10 to 0.3.
Control is performed within the range of 5 m / sec. (3) The linear pressure of the wet press is 20 to 80 kg / cm
And the tension press provided in the middle of the dryer is set to a linear pressure of 30% under the condition of wet paper moisture of 35% or more.
Control at ~ 100 kg / cm.

In processing the polyolefin resin film, the nip pressure between the cooling rope and the pressure roll is set to 20.
The operation is performed at a high linear pressure of ４５45 kg / cm, and the thickness of the polyolefin resin film layer is controlled in the range of 10 to 40 μm. The composition of the silver halide emulsion used in the present invention is small, and one layer is a silver chlorobromide emulsion having a silver chloride content of 90 mol% or more, preferably 95 mol% or more. It is a silver chlorobromide emulsion of 99 mol% or more.

The method for preparing silver halide monodispersed emulsions having different sensitivities used in the present invention is not particularly limited. For example, two or more kinds of monodispersed silver halide emulsions having different average grain sizes can be mixed. When two or more monodisperse silver halide emulsions are mixed, the difference in sensitivity between the high-speed emulsion and the low-speed emulsion is preferably 0.05 to 0.6 logE,
~ 0.5 logE is particularly preferred. The mixing ratio is not particularly limited. The particle size distribution of the silver halide grains according to the present invention, preferably in the particle size distribution of the silver halide grains,
The coefficient of variation is 0.22 or less, more preferably 0.15
The following monodispersed silver halide grains are provided. Here, the coefficient of variation is a coefficient indicating the breadth of the particle size distribution, and is represented by (standard deviation of particle size distribution / average particle size).

The silver halide grains according to the present invention may have any shape. One preferable example is a cube having a (100) plane as a crystal surface.
U.S. Pat. Nos. 4,183,756 and 4,225,6
No. 66, JP-A-55-26589, JP-B-55-42
No. 737, etc., and The Journal of Photographic Science (J. Photo. Sci) 21 , 39
(1973) and the like, particles having shapes such as an octahedron, a tetrahedron, and a dodecahedron are produced,
This can also be used. Further, particles having twin planes or irregularly shaped particles may be used.

In the present invention, the silver halide grains containing 90 mol% or more of silver chloride according to the present invention, for example, silver chlorobromide grains are chemically sensitized using at least a sulfur sensitizer and a gold sensitizer. You. Known sulfur sensitizers can be used. For example, sulfur sensitizers that can be used include thiosulfate, allyl thiocarbamide thiourea, allyl isothiocyanate, cystine, p-toluene thiosulfonate, rhodanine and the like. Others
U.S. Pat. Nos. 1,574,944 and 2,410,6
No. 89, No. 2,278,947, No. 2,728,
No. 668, No. 3,501, 313, No. 3,65
6,955, German Patent 1,422,86
9, JP-A-56-24937, JP-A-55-450
Sulfur sensitizers described in, for example, JP-A No. 16 can also be used. The sulfur sensitizer may be added in such an amount as to sensitize the silver halide, and the addition amount is not particularly limited. In the case of sodium thiosulfate, it is preferably 1 × 10 ⁻⁷ to 1 × 10 ⁻⁷ per mol of silver halide. × 10 ^-5 , more preferably 2
It can be contained in an amount of from × 10 ^-6 to 8 × 10 ^-6 mol.

As the gold sensitizer that can be used, the oxidation number of gold may be +1 or +3, and various gold compounds are used. Representative examples include chloroaurate, potassium chloroaurate, auric trichloride, potassium auric thiocyanate, potassium iodooleate, tetracyano auric acidide, ammonium aurothiocyanate, pyridyl trichlorogold, and the like. The addition amount of the gold sensitizer varies depending on various conditions, but the preferable addition amount is 5 × 10 ⁻⁷ to 1 mol per mol of silver halide.
5 × 10 ^-3 mol, preferably 2 × 10 ^-6 to 1 × 1
^0-4 molar concentration. More preferably 2.6 × 10
⁻⁶ to 4 × 10 ⁻⁵ , most preferably 2.6 × 10 ^{−6 to} 9 ×
10 ^-6 mol. The gold compound may be added at any stage in the production process of the silver halide emulsion, but is preferably between the end of silver halide formation and the end of chemical sensitization.

The silver halide emulsion to be used in the silver halide light-sensitive material of the present invention may contain an antifogging agent for optimizing chemical sensitization or preventing a reduction in sensitivity or the occurrence of fogging during storage or development of the light-sensitive material. Compounds called stabilizers can be added. These compounds include 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene, 3-methylbenzothiazole, 1-phenyl-5
Many heterocyclic compounds, mercapto compounds, and the like, including mercaptoterolazole, are known. Particularly preferred are purine derivatives and mercapto compounds represented by the following general formula [S]. General formula [S]

[0024]

Embedded image In the formula, Q represents an atomic group necessary for forming a 5- or 6-membered heterocyclic ring or a 5- or 6-membered heterocyclic ring condensed with a benzene ring, and M represents a hydrogen atom or a cation. Examples of the heterocyclic ring formed by Q include imidazole, triazole, thiadiazole, oxadiazole, tetrazole, thiazole, oxazole, selenazole, triazine, benzimidazole, naphthimidazole,
Rings such as benzothiazole, naphthothiazole, benzoselenazole, naphthoselenazole, benzoxazole and the like can be mentioned. Examples of the cation represented by M include an alkali metal (for example, sodium and potassium), an ammonium group, and the like. Representative examples of the heterocyclic compound which forms a sparingly soluble salt with silver ions used in the present invention are shown below.

[0025]

Embedded image

[0026]

Embedded image

[0027]

Embedded image

These compounds are disclosed in JP-A-63-3624.
No. 3, No. 63-146044, Japanese Patent Application No. 63-2036
No. 5, etc. The silver halide emulsion according to the present invention can be spectrally sensitized to a desired wavelength region using a dye known as a sensitizing dye in the photographic industry. The sensitizing dyes may be used alone or in combination of two or more. A dye which does not have a spectral sensitizing effect by itself together with the sensitizing dye, or a compound which does not substantially absorb visible light, and which contains a supersensitizer which enhances the sensitizing effect of the sensitizing dye is contained in the emulsion. Is also good.

Various sensitizing dyes can be used, and each sensitizing dye can be used alone or in combination of two or more. The sensitizing dyes advantageously used in the present invention include, for example, the following.

That is, sensitizing dyes used in blue-sensitive silver halide emulsions include, for example, West German Patent 929,080.
Nos. 2,231,658 and 2,493,7
No. 48, 2,503,776, 2,519,00
Nos. 1, 2,912,329 and 3,656,959
Nos. 3,672,897, 3,694,217
Nos. 4,025,349 and 4,046,572
No., British Patent 1,242,588, JP-B-44-14
No. 030, No. 52-24844 and the like. Sensitizing dyes used in green-sensitive silver halide emulsions include, for example, US Pat.
9,201, 2,072,908, 2,73
9,149 and 2,945,763, British Patent 50
Typical examples thereof include cyanine dyes, merocyanine dyes and complex cyanine dyes described in US Pat. No. 5,979. Further, examples of sensitizing dyes used in red-sensitive silver halide emulsions include, for example, U.S. Pat. Nos. 2,269,234, 2,270,378, 2,442,710, and 2,454,629. And a cyanine dye, a merocyanine dye and a complex cyanine dye as described in JP-A Nos. 2,776,280 and the like. Further, cyanine dyes, merocyanine dyes or composite cyanines as described in U.S. Pat. Nos. 2,213,995, 2,493,748, 2,519,001, and German Patent 929,080. Dyes can be advantageously used in green-sensitive silver halide emulsions or red-sensitive halide emulsions.

These sensitizing dyes may be used alone,
These may be used in combination. Combinations of sensitizing dyes are often used, especially for supersensitization. Representative examples are U.S. Pat. Nos. 2,688,545 and 2,972.
7,229, 3,397,060, 3,52
2,052, 3,527,641, 3,61
7,293, 3,628,964 and 3,66
6,480, 3,672,898, 3,67
9,428, 3,703,377, 4,02
No. 6,707, British Patent 1,344,281,
Nos. 507,803, JP-B-43-4936, 53-
12375, JP-A-52-110618, JP-A-52-1
No. 109925 and the like.

Although the amount of the sensitizing dye to be added is not particularly limited, it is generally from 1 × 10 ^-7 to 1 × per mol of silver halide.
It is preferably used in the range of 10 ^-3 mol, more preferably 5 × 10 ^{-6 to} 5 × 10 ^-4 mol. As a method for adding the sensitizing dye, a method well known in the art can be used.

The sensitizing dye to be contained in the silver halide emulsion of the present invention is dissolved in the same or different solvent, and these solutions are mixed or added separately before addition to the silver halide emulsion. Is also good. When they are added separately, the order, time and interval can be arbitrarily determined according to the purpose. The sensitizing dye may be added to the emulsion at any time during the emulsion production process, but preferably during or after chemical ripening, and more preferably during chemical ripening.

When the silver halide photographic light-sensitive material of the present invention is applied to a color photographic light-sensitive material, a yellow dye-forming coupler is usually used in a blue-sensitive emulsion layer, a magenta dye-forming coupler is used in a green-sensitive emulsion layer, and red A cyan dye-forming coupler is used in the sensitive emulsion layer. However, a silver halide color photographic light-sensitive material may be prepared in a manner different from the above-mentioned combination depending on the purpose.

It is desirable that these dye-forming couplers have a group having a carbon number of 8 or more in the molecule, which makes the coupler non-diffusible. Further, even in 4-equivalent These dye-forming couplers that need to silver ions 4 molecules to one molecule of dye is formed is reduced, it is only silver ions 2 molecules is reduced 2 Equivalence may be used.

As the yellow dye-forming coupler, various acylacetanilide-based couplers can be preferably used. Among them, a coupler represented by the following general formula Y-1 is advantageous.

Formula [Y-1]

Embedded image In the formula, R ₁ represents an alkyl group, a cycloalkyl group or an aryl group, R ₂ represents an alkyl group, a cycloalkyl group, an acyl group, or an aryl group, and R ₃ represents a group that can be substituted on a benzene ring. . n represents 0 or 1. X
₁ represents a hydrogen atom or a group capable of leaving upon coupling with an oxidized form of a developing agent, and Y ₁ represents an organic group.

In the general formula (Y-1), examples of the alkyl group represented by R ₁ include a methyl group, an ethyl group, an isopropyl group, a t-butyl group and a dodecyl group. The alkyl group represented by R ₁ includes those further having a substituent, and examples of the substituent include a halogen atom, an aryl group, an alkoxy group, an aryloxy group, an alkylsulfonyl group, an acylamino group, and a hydroxy group. .

Examples of the cycloalkyl group represented by R ₁ include a cyclopropyl group, a cyclohexyl group and the like, and an organic hydrocarbon residue condensed with two or more cycloalkyls (for example, an adamantyl group). The cycloalkyl group represented by R ₁ includes those having a substituent, and examples of the substituent include those exemplified as the substituent of the alkyl group represented by R ₁ . The aryl group represented by R ₁ includes a phenyl group and the like, and the aryl group includes those having a substituent. Examples of the substituent include R
Examples of the substituent of the alkyl group represented by ₁ include those exemplified above and an alkyl group. R ₁ is preferably a branched alkyl group.

In the general formula (Y-1), examples of the alkyl group, cycloalkyl group and aryl group represented by R ₂ include the same groups as R ₁ , including those each having a substituent. As the substituent, those exemplified for R ₁ can be mentioned. Examples of the acyl group include an acetyl group, a propionyl group, a butyryl group, a hexanoyl group, and a benzoyl group, and the acyl group includes those having a substituent. R ₂ is preferably an alkyl group or an aryl group, more preferably an alkyl group, and still more preferably a lower alkyl group having 5 or less carbon atoms.

In the general formula (Y-1), the group which can be substituted on the benzene ring represented by R ₃ includes a halogen atom (for example, chlorine atom) and an alkyl (for example, ethyl, isopropyl, t-butyl). , An alkoxy group (eg, a methoxy group), an aryloxy group (eg, a phenyloxy group), an acyloxy group (eg, an acetyloxy group, a benzoyloxy group), an acylamino group (eg, an acetamido group, a benzoylamino group), and a carbamoyl group (eg, N- Methylcarbamoyl group, N-phenylcarbamoyl group) alkylsulfonamide group (eg, ethylsulfonamide group), arylsulfonamide group (eg, phenylsulfonamide group), sulfamoyl group (eg, N-
Propylsulfamoyl group, N-phenylsulfamoyl group) and imide group (for example, succinimide group, glutarimide group) and the like.

In the general formula (Y-1), Y1 represents an organic group, and is preferably a group represented by the following general formula (Y-II). Formula (Y-II)-(J) p-R _{4 In} Formula (Y-II), R ₄ represents an organic group containing one bonding group having a carbonyl or sulfonyl unit.
p represents 0 or 1.

Examples of the group having a carbonyl group include an ester group, an amide group, a carbamoyl group, a ureido group and a urethane group. Examples of the group having a sulfonyl unit include a sulfonyl group, a sulfonylamino group, a sulfamoyl group and an aminosulfonyl group. And an amino group. R ₅ represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group.

Examples of the alkyl group represented by R ₅ include a methyl group, an ethyl group, an isopropyl group, a t-butyl group and a dodecyl group. Examples of the aryl group represented by R ₅ include a phenyl group and a naphthyl group. Examples of the heterocyclic group represented by R ₅ include a pyridyl group.

Each of the groups represented by R ₅ includes those having a substituent. The substituent is not particularly limited, but typical examples include a halogen atom (such as a chlorine source atom), an alkyl group (such as an ethyl group and a t-butyl group),
Aryl group (phenyl group, p-methoxyphenyl group, naphthyl group, etc.), alkoxy group (ethoxy group, benzyloxy group, etc.), aryloxy group (phenoxy group, etc.), alkylthio group (ethylthio group, etc.), arylthio group (phenylthio group, etc.) Group), alkylsulfonyl group (β-hydroxyethylsulfonyl group, etc.), arylsulfonyl group (phenylsulfonyl group, etc.), acylamino group (alkylcarbonylamino group, such as acetamido group, arylcarbonylamino group, such as benzoylamino group, etc.) A carbamoyl group (eg, an alkylcarbamoyl group such as an N-methylcarbamoyl group, an arylcarbamoyl group such as an N-phenylcarbamoyl group), an acyl group (eg, an alkylcarbonyl group such as an acetyl group, an arylcarbonyl group such as a benzoyl group), Sur Niruamino group (alkylsulfonylamino group such as a methyl sulfone amino group, and aryl sulfonylamino groups such as a phenylsulfonylamino group),
A sulfamoyl group (an alkylsulfamoyl group such as an N-methylsulfamoyl group, an arylsulfamoyl group such as an N-phenylsulfamoyl group, etc.), a hydroxy group,
And a nitrile group.

In the general formula (Y-I), examples of the group leaving during the coupling reaction with the oxidized form of the developing agent represented by X ₁ include the following general formula (Y-III) or general formula (Y-III) And a group represented by formula (Y-IV). The general formula (Y-
III) —OR _{6 In the} general formula (Y-III), R ₆ represents an aryl group or a heterocyclic group including those having a substituent.

General formula (Y-IV)

Embedded image In the general formula (Y-IV), Z ₁ taken together with the nitrogen atom, represents a non-metallic atomic group necessary for forming a 5 or 6-membered ring. Here, the atomic groups necessary to form the non-metallic atomic group include, for example, substituted or unsubstituted methylene and methine,

Embedded image -And the like.

The yellow coupler represented by the formula (Y-1) may form a bis-form by bonding at the R ₁ , R ₃ or Y ₁ portion. Particularly preferred as the yellow coupler of the present invention are compounds represented by the following formula (YV). General formula (YV)

Embedded image

In the general formula (YV), R ₁ , R ₂ ,
R ₃ , n and J represent R ₁ , n in the general formula (Y-I)
It has the same meaning as R ₂ , R ₃ , n and J, p in the general formula (Y-II), and the same ones are exemplified. R ₇ is an alkylene group, an arylene group, an alkylene arylene group, an arylene alkylene group, or —A—V 1 -B (A and B each represent an alkylene group, an arylene group, an alkylene arylene group, or an arylene alkyl group; And R ₈ represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group. P represents a linking group having a carbonyl or sulfonyl unit.
X ₂ represents a group capable of leaving during coupling with the oxidized form of the developing agent.

In the general formula (YV), examples of the alkylene group represented by R ₇ , A or B include methylene, ethylene, trimethylene, butylene, hexylene, methylmethylene, and ethylethylene. Group, 1-
Examples thereof include linear or branched ones such as a methylethylene group, a 1-methyl-2-ethylethylene group, a 2-decylethylene group, and a 3-hexylpropylene group. The alkylene group includes those having a substituent (eg, an aryl group),
Examples thereof include a 1-benzylethylene group, a 2-phenylethylene group, and a 3-naphthylpropylene group.

Examples of the arylene group include a phenylene group and a naphthylene group, and the arylene group includes those having a substituent. Examples of the alkylene arylene group include a methylene phenyl group and the like, and examples of the arylene alkylene group include a phenylene methylene group and include those having respective substituents. Examples of the divalent linking group represented by V1 include groups such as -O- and -S-.

Among the alkylene group, arylene group, alkylene arylene group, arylene alkylene group and -AV1-B- represented by R ₇ , an alkylene group is particularly preferred.

In the general formula (YV), the alkyl group represented by R ₈ is, for example, ethyl, butyl, hexyl, octyl, 2-ethylhexyl, dodecyl, hexadecyl, 2-hexyl Examples thereof include straight-chain or branched ones such as decyl group and octadecyl group. Examples of the cycloalkyl group include a cyclohexyl group. Examples of the aryl group include a phenyl group and a naphthyl group. Further, examples of the heterocyclic group include a pyridyl group. The alkyl group, cycloalkyl group, aryl group and heterocyclic group represented by R ₈ include those further having a substituent. The substituent is not particularly limited, it may be mentioned those exemplified as the substituent of the R _5. Provided that the substituent of R ₈ is p
Organic groups having a dissociable hydrogen atom (for example, a phenolic hydrogen atom) having a Ka value of 9.5 or less are not preferred.

In the general formula (YV), P represents a bonding group having a carbonyl or sulfonyl unit, preferably a group represented by the following group (Y-VI), and preferably 6) to 9) Is a bonding group represented by

In the formula, R and R 'each represent a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group. The group represented by R and R ', wherein it is possible to include the groups exemplified in R _5, These groups include those having a substituent. Examples of the substituent include those exemplified as the aforementioned R ₅ substituent. R and R 'are preferably hydrogen atoms.

The yellow coupler represented by formula (Y-I) of the present invention is preferably used in an amount of 1 × 10 ⁻³ to 1 mol, more preferably 1 × 10 ⁻² to 8 ×, per 1 mol of silver halide. It can be used in the range of 10 ^-1 mol. Next, specific examples of the yellow coupler represented by the above general formula (Y-I) are shown.

[0057]

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[0058]

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[0059]

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[0060]

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[0061]

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As the cyan dye-forming coupler, naphthol couplers and phenol couplers can be preferably used. As the magenta dye image forming coupler, 5-pyrazolone, pyrazolotriazole, pyrazolobenzimidazole, indazolone and cyanoacetyl couplers are preferably used.

The compound such as a dye-forming coupler of the light-sensitive material of the present invention is generally used in combination with a high-boiling organic solvent having a boiling point of about 150 ° C. or higher or a water-insoluble polymer, if necessary, with a low-boiling and / or water-soluble organic solvent. And then emulsified and dispersed using a surfactant in a hydrophilic binder such as an aqueous gelatin solution,
It is added to the desired hydrophilic colloid layer. A step of removing the low boiling organic solvent at the same time as the dispersion or dispersion may be included.

The high-boiling organic solvent is preferably a compound having a dielectric constant of 6.5 or less, for example, esters such as phthalic acid ester and phosphoric acid ester having a dielectric constant of 6.5 or less, organic acid amides, ketones, and hydrocarbons. And the like. More preferably, it is a high-boiling organic solvent having a dielectric constant of 6.5 or less and 1.9 or more and a vapor pressure at 100 ° C. of 0.5 mmHg or less. Of these, phthalic esters and phosphoric esters are more preferred. Most preferably, it is a dialkyl phthalate having an alkyl group having 9 or more carbon atoms. Further, the high boiling point organic solvent may be a mixture of two or more kinds.
In addition, the dielectric constant indicates a dielectric constant at 30 ° C.

These high-boiling organic solvents are generally used in a proportion of 0 to 400% by weight based on the coupler. Preferably it is 10 to 100% by weight based on the coupler. The light-sensitive material of the present invention can be, for example, a color negative negative and a positive film, and a color photographic paper. Particularly, when the color photographic paper provided for direct viewing is used, the effects of the present invention can be effectively used. Be demonstrated.

The light-sensitive material of the present invention such as the color photographic paper may be of a single color or a multicolor.
The silver halide emulsion used in the present invention can be optically sensitized to a desired wavelength region using a dye known as a sensitizing dye in the photographic industry. As the binder used in the silver halide photographic light-sensitive material of the present invention, gelatin is preferably used.

The gelatin usually used in the photographic industry includes, in the production process from collagen, alkali-treated gelatin accompanied by treatment with lime and the like, and acid-treated gelatin accompanied by treatment with hydrochloric acid and the like.
Manufactured using pig skin as a raw material.

For details of the production methods and properties of these gelatins, see, for example, “Ther
Macromolecular Chemistry
of Gelatin ", Academic Pres
s, 187-217 (1964); H. Jam
es: The Theory of the Photo
graphical Process 4th. ed. 1
977, (Mcmilllan), p. 55, Handbook of Scientific Photography (above), pp. 72-75 (Maruzen), Basics of Photographic Engineering-Silver Salt Photography, pp. 119-124 (Corona).

The gelatin used in the light-sensitive material of the present invention may be a lime-processed gelatin or an acid-processed gelatin, or a gelatin produced from any of cow bone, cow skin, pig skin and the like. Good but preferably lime-processed gelatin produced from bovine bone. The photographic emulsion layer and other hydrophilic colloid layers of the light-sensitive material of the present invention crosslink binder (or protective colloid) molecules,
The film is hardened by using a hardening agent for increasing the film strength alone or in combination.

The hardening agent is preferably added in such an amount that the photosensitive material can be hardened to such an extent that it is not necessary to add the hardening agent to the processing solution. However, the hardening agent can be added to the processing solution. . In order to prevent fogging due to discharge caused by the photosensitive material being charged by friction or the like in the hydrophilic colloid layer such as the protective layer and the intermediate layer in the photosensitive material of the present invention, an ultraviolet absorber is used to prevent deterioration of an image due to ultraviolet light. May be included.

The light-sensitive material of the present invention may be provided with an auxiliary layer such as a filter layer, an antihalation layer and / or an anti-irradiation layer. In these layers and / or the emulsion layer, a dye other than the dye of the present invention, which flows out of the color photographic material or is bleached during the development processing, may be contained. A matting agent can be added to the silver halide emulsion layer and / or other hydrophilic colloid layers of the light-sensitive material of the present invention for the purpose of reducing the gloss of the light-sensitive material, improving the brushability, preventing sticking between the light-sensitive materials, and the like.

The light-sensitive material of the present invention may contain a lubricant to reduce sliding friction. In the present invention, an antistatic agent for the purpose of preventing static electricity can be added to the photosensitive material. The antistatic agent may be used in the antistatic layer on the side of the support on which the emulsion is not laminated, and may be used for protecting the emulsion layer and / or other than the emulsion layer on the side of the support on which the emulsion layer is laminated. It may be used for a colloid layer. The photographic emulsion layer and / or other hydrophilic colloid layer in the light-sensitive material of the present invention may have improved coating properties, improved antistatic properties, improved slipperiness, emulsified dispersion, prevented adhesion, and improved development,
Various surfactants can be used for the purpose of improving photographic properties (such as hardening and sensitization).

The light-sensitive material of the present invention may be subjected to corona discharge, ultraviolet irradiation, flame treatment, etc. on the surface of the support, if necessary, and then directly or undercoating (adhesion, antistatic property, It may be applied via one or more subbing layers to improve degree stability, rub resistance, hardness, antihalation, friction properties and / or other properties.

In coating the silver halide emulsion of the present invention, a thickener may be used to improve coatability. Extrusion coating and curtain coating, in which two or more layers can be applied simultaneously, are particularly useful as a coating method. In the processing of the light-sensitive material of the present invention, the color developing agents used in the color developing solution include known ones widely used in various color photographic processes.

These developers include aminophenol-based and p-phenylesinamine-based derivatives. These compounds are generally used in the form of a salt, for example, the hydrochloride or sulfate, for stability in the free state. These compounds are generally used at a concentration of preferably 0.1 to 30 g per liter of the color developing solution, and preferably about 1 g to about 15 g per liter of the color developing solution. Examples of the aminophenol-based developer include o-aminophenol, p-aminophenol, 5-amino-2-oxytoluene, 2-amino-3-oxytoluene, 2-oxy-3-amino-1,4-dimethyl -Including benzene and the like.

Particularly useful primary aromatic amine color developing agents are N, N-dialkyl-p-phenylenediamine compounds, and the alkyl group and the phenyl group may be substituted with any substituent. Among them, particularly useful compounds are N, N-diethyl-p-phenylenediamine hydrochloride, N-methyl-p-phenylenediamine hydrochloride,
N, N-dimethyl-p-phenylenediamine hydrochloride, 2
-Amino-5- (N-ethyl-N-dodecylamino)-
Toluene, N-ethyl-N-β-methanesulfonamidoethyl-3-methyl-4-aminoaniline sulfate, N-
Ethyl-N-β-hydroxyethylaminoaniline, 4
-Amino-3-methyl-N, N-diethylaniline, 4
-Amino-N- (2-methoxyethyl) -N-erti-
Examples thereof include 3-methylaniline-p-toluenesulfonate.

In the color developer used for processing the light-sensitive material of the present invention, a known developer component compound can be added in addition to the primary aromatic amine-based color developer. For example, alkali agents such as sodium hydroxide, sodium carbonate, potassium carbonate, etc., alkali metal sulfites, alkali metal bisulfites, alkali metal thiocyanates, alkali metal halides, benzyl alcohol, water softeners and thickeners are optional. Can also be contained.

The pH value of the color developing solution is usually 7 or more, most usually about 10 to 13. The color development temperature is usually 15 ° C. or higher, and is generally in the range of 20 ° C. to 50 ° C. For rapid development, it is preferred to carry out at 30 ° C. or higher. Generally, the color development time is preferably in the range of 20 seconds to 60 seconds, more preferably in the range of 30 seconds to 50 seconds.

The light-sensitive material of the present invention may contain these color developing agents themselves or as a precursor thereof in a hydrophilic colloid layer, and may be processed by an alkaline activating bath. The color developing agent precursor is a compound capable of forming a color developing agent under alkaline conditions, and is a Schiff-based precursor with an aromatic aldehyde derivative, a polyvalent metal ion complex precursor, a phthalic imide derivative precursor, a phosphoramide derivative precursor, and sugar. Examples include amine reactant precursors and urethane type precursors. The precursors of these aromatic primary amine color developing agents are described, for example, in U.S. Pat. Nos. 3,342,599, 2,507,114, 2,695,234, 3,719,492, and British Patent Nos. 803,783 and JP-A-53-185.
Nos. 628 and 54-79035, Research Disclosure Magazine No. 15159, No. 12146, and No. 1
No. 3924.

These aromatic primary amine color developing agents or precursors thereof need to be added in such an amount that sufficient color development can be obtained only by the amount thereof when activated. Although this amount varies greatly depending on the type of light-sensitive material, it is generally used in the range of 0.1 mol to 5 mol, preferably 0.5 mol to 3 mol per mol of silver halide. These color developing agents or precursors thereof can be used alone or in combination.

Water, methanol,
It can be added by dissolving in an appropriate solvent such as ethanol or acetone, or can be added as an emulsified dispersion using a high boiling point organic solvent such as dibutyl phthalate, dioctyl phthalate, tricresyl phosphate, etc. It can also be added by impregnating a latex polymer as described in No. 14850. The light-sensitive material of the present invention is subjected to bleaching and fixing after color development. The bleaching process may be performed simultaneously with the fixing process.

Many compounds are used as the bleaching agent. Among them, polyvalent metal compounds such as iron (III), cobalt (III), and (II), especially complex salts of these polyvalent metal cations and organic acids, for example, ethylenediamine Metal complex salts such as aminopolycarboxylic acids such as tetraacetic acid, nitrilotriacetic acid, N-hydroxyethylethylenediamine diacetic acid, malonic acid, tartaric acid, malic acid, diglycolic acid, dithioglycolic acid or ferricyanates, dichromic acid Etc. alone or in an appropriate combination.

As the fixing agent, a soluble complexing agent which solubilizes silver halide as a complex salt is used. Examples of the soluble complexing agent include sodium thiosulfate, ammonium thiosulfate, potassium thiocyanate, thiourea, thioether and the like. After the fixing process, a washing process is usually performed. Further, as an alternative to the water washing treatment, a stabilization treatment may be performed, or both may be used in combination. The stabilizing solution used for the stabilizing treatment includes a pH adjuster, a chelating agent,
An anti-binder agent and the like can be contained. These specific conditions can be referred to JP-A-58-134636 and the like.

[Embodiments] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited thereto. Emulsion Production Example (Preparation of Blue-Sensitive Silver Halide Emulsion) The following (solution A) and (solution B) were adjusted to pAg = 6.5 and pH = 3.0 in 1000 ml of a 2% gelatin aqueous solution kept at 40 ° C. 3 while controlling
The mixture was added simultaneously over 0 minutes, and the following (solution C) and (D
Liquid) to 180 while controlling pAg = 7.3 and pH = 5.5.
Co-added over minutes. At this time, the control of pAg is described in
The pH was controlled using an aqueous solution of sulfuric acid or sodium hydroxide.

(Solution A) Sodium chloride 3.42% Potassium bromide 0.03% Add water to 200 ml (Solution B) Silver sulfate 10 g Add water to 200 ml (Solution C) Sodium chloride 102.7% Potassium bromide 1.0 g K ₂ IrCl ₂ 0.01 mg Add water 600 ml (solution D) Silver nitrate 300 g Add water 600 ml

After the addition is completed, Demol N manufactured by Kao Atlas Co., Ltd.
And a 20% aqueous solution of magnesium sulfate, and then mixed with an aqueous gelatin solution to obtain an average particle diameter of 0.1%. A monodisperse cubic emulsion EMP-1 having a particle size of 85 μm and a coefficient of variation (σ / r) of 0.07 silver chloride of 99.5 mol% was obtained.

The emulsion EMP-1 was chemically ripened at 50 ° C. for 90 minutes using the following compounds to obtain a blue-sensitive silver halide emulsion (Em-B-1). Sodium thiosulfate 0.8 mg / mol AgX stabilizer STAB-1 6 × 10 ^-4 mol / mol AgX sensitizing dye BS-1 4 × 10 ^-4 mol / mol AgX sensitizing dye BS-2 1 × 10 ^-4 mol / Mol AgX

EMP except that the addition time of Solution A and Solution B was changed.
The average particle size is 0.77 μm and the variation coefficient (σ
/R)=0.10 and a monodispersed cubic emulsion EMP-2 having a silver chloride content of 99.5 mol% was obtained. Chemical ripening was carried out in the same manner as Em-B-1 to obtain a blue-sensitive silver halide emulsion Em-B-2. The difference in sensitivity from Em-B-1 was 0.3 logE.

EMP-1 Sensitizing Dyes BS-1, BS-2
Was increased and chemically ripened to obtain Em-B-3. Em-
The difference in sensitivity from B-1 was 0.15 logE. The average particle diameter was 0.7 in the same manner except that the halogen composition of the liquid C was changed.
Comparative Emulsion A having a thickness of 5 μm, a coefficient of variation (σ / r) of 0.09, and a silver chloride content of 60 mol% was prepared and chemically ripened.

[0090] (green-sensitive silver halide process for the preparation of Emulsion) The solution A, B liquid addition times and the C solution and D solution except that the addition time was changed each similar to the average particle in size and EMP-1 in Monodisperse cubic emulsion EMP-3 having a coefficient of variation (σ / r = 0.08) of 0.45 μm and a silver chloride content of 99.5 mol%.
And EMP-4 having an average particle size of 0.40 μm was obtained. EM
For P-3 and 4, use the following compound at 55 ° C for 120
Green sensitized silver halide emulsion (Em-G
-1, Em-G-2). Em-G-1 and Em-G
The sensitivity difference of -2 was 0.4 logE. Sodium thiosulfate 1.5 mg / mol AgX chloroauric acid 1.0 mg / mol AgX stabilizer STAB-1 6 × 10 ^-4 mol / mol AgX sensitizing dye BS-1 4 × 10 ^-4 mol / mol AgX

(Method for Preparing Red-Sensitive Silver Halide Emulsion) The average particle size was adjusted in the same manner as in EMP-1 except that the addition time of the above-mentioned solutions A and B and the addition times of the above-mentioned solutions C and D were changed. A monodispersed cubic emulsion EMP-5 having a diameter of 0.55 μm, a coefficient of variation (σ / r = 0.08), a silver chloride content of 99.5 mol%, and EMP-6 having an average particle size of 0.5 μm were obtained. EMP-5
And 6 were chemically ripened at 55 ° C. for 120 minutes using the following compounds to give a red-sensitive silver halide emulsion (Em-R-1,
Em-R-2) was obtained. The difference in sensitivity between Em-R-1 and Em-R-2 was 0.4 logE. Sodium thiosulfate 1.5 mg / mol AgX chloroauric acid 1.0 mg / mol AgX stabilizer STAB-1 6 × 10 ^-4 mol / mol AgX sensitizing dye RS-1 4 × 10 ^-4 mol / mol AgX

[0092]

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[0093]

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(Production of Support) Softwood pulp (NB) beaten to a Canadian standard freeness of 250 ml with a refiner
SP) 30% by weight and 70% by weight of hardwood pulp (LBKP) beaten to a Canadian standard freeness of 280 ml,
This blended pulp was made into paper at a flow rate of 0.15 m / sec in the inlet, passed through a wet press three times at a linear pressure of 20 kg / cm, and in the middle of a drier at a paper moisture of 35% and a linear pressure of 40 kg / cm.
Under the conditions described below.

Then, the obtained paper was further dried with a drier and machine calendered at a linear pressure of 50 kg / cm to obtain a base paper having a weight of 170 g / m ² . After subjecting the base paper to a corona discharge treatment, a low-density polyethylene containing 14% by weight of anatase-type titanium oxide is extruded on the back surface and a 25-μm-thick resin temperature of 330 ° C. is extruded on the back surface. The coating was applied to obtain a photographic paper support D. Supports A and B were obtained in the same manner. However, A,
B changed the center plane average roughness by changing the weight ratio of softwood pulp to hardwood pulp. Same as B except that TiO ₂
Was changed to obtain C.

In this coating step, the linear pressure between the cling roll and the pressure roll was 25 kg / cm. The center plane average roughness (SRa) of the obtained support was measured using a stylus type surface roughness analyzer SE-30H manufactured by Kosaka Laboratories, and calculated according to the formula [I]. Similarly, photographic printing paper base papers A to D having a center plane average roughness (SRa) and a titanium oxide content in a polyethylene layer as shown in Table 1 were produced.

[0097]

[Table 1]

Each of the following layers was coated on supports A to D to prepare a multilayer silver halide color photographic light-sensitive material. First layer coating solution Yellow coupler (Y-1) 26.7 g, dye image stabilizer (ST-1) 10.0 g, dye image stabilizer (ST)
-2) 6.67 g of an additive (HQ-1), 0.67 g of an additive (HQ-1) and 6.67 g of a high boiling point organic solvent (DNP) were mixed with ethyl acetate 6
0 ml was added and dissolved, and this solution was added to a 20% surfactant (SU).
-1) A yellow coupler dispersion was prepared by emulsifying and dispersing in 220 ml of a 10% aqueous gelatin solution containing 7 ml using an ultrasonic homogenizer. This dispersion was mixed with a blue-sensitive silver halide emulsion (containing 10 g of silver) as shown in Table 2 prepared under the following conditions to prepare a first layer coating solution. The coating solutions for the second to seventh layers were prepared in the same manner as the coating solution for the first layer.
Further, (H-1) is used in the second and fourth layers as a hardener,
(H-2) was added to the seventh layer. Surfactants (SU-2) and (SU-3) were added as coating aids to adjust the surface tension.

[0099]

[Table 2]

[0100]

[Table 3]

[0101]

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[0102]

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[0103]

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[0104]

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[0105]

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[0106]

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[0107]

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[0108]

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[0109]

[Table 4]

After the above-mentioned samples were exposed as usual, the following development processing was carried out and sensitometry was carried out. The sensitivity was represented by the reciprocal of the exposure amount necessary to obtain a reflection density of 0.8, and evaluated by its relative value. The gradation has a reflection density of 0.
It is represented by a slope of 8 to 1.8. The sharpness was determined by exposing each sample to a resolution test chart with blue light, measuring the density of each color image with a microphotometer, and setting the value represented by the following equation as the sharpness.

(Equation 4) The greater the value, the better the sharpness. Table 3 shows the results of photographic characteristics and sharpness of the blue-sensitive layer.

[0111] step Temperature Time color development 35.0 ± 0.3 ° C. 45 seconds blix 35.0 ± 0.5 ° C. 45 seconds stabilized 30 to 34 ° C. 90 seconds Drying 60-80 ° C. 60 seconds

[0112] color developer pure water 800ml Triethanolamine 10 g N, N-diethylhydroxylamine 5g Potassium bromide 0.02g Potassium chloride 2g potassium sulfite 0.3 g 1-hydroxyethylidene-1,1-diphosphonic acid 1.0g ethylenediamine Tetraacetic acid 1.0 g Catechol-3,5-diphosphonic acid disodium 1.0 g N-ethyl-N-β methanesulfonamidoethyl-3-methyl-4-aminoaniline sulfate 4.5 g Fluorescent whitening agent (4 4'-diaminostilbene sulfonic acid derivative) 1.0 g Potassium carbonate 27 g Water is added to make the total volume 1 liter, and the pH is adjusted to 10.10.

Bleaching / fixing solution Ethylenediaminetetraacetic acid ammonium ferric ammonium dihydrate 60 g Ethylenediaminetetraacetic acid 3 g Ammonium thiosulfate (70% aqueous solution) 100 ml Ammonium sulfite (40% aqueous solution) 27.5 ml Water was added to bring the total volume to 1 liter. Adjust to pH = 5.7 with potassium or glacial acetic acid.

Stabilizing solution 5-chloro-2-methyl-4-isothiazolin-3-one 1.0 g ethylene glycol 1.0 g 1-hydroxyethylidene-1,1-diphosphonic acid 2.0 g ethylenediaminetetraacetic acid 1.0 g water Ammonium oxide (20% aqueous solution) 3.0 g Fluorescent whitening agent (4,4'-diaminostilbene sulfonic acid derivative) 1.5 g Water was added to make a total volume of 1 liter, and pH = 7.0 with sulfuric acid or potassium hydroxide. Adjust to

[0115]

[Table 5] From Table-3, Samples 1 and 2 have low sensitivity, and Samples 3 and 4 have high gradation and poor shadow depiction. Sample 5,
In Nos. 6 and 7, the shadow depiction is improved, but the sharpness is deteriorated. On the other hand, it can be seen that Samples 8 to 11 of the present invention have improved sensitivity, shadow depiction, and sharpness.

Example 2 Samples 1, 9, 10 and 11 of Example 1 were respectively exposed to green light, and each color image was measured in the same manner as in Example 1 to evaluate sensitometry and sharpness. Was. The results are shown in Table-3.

[0117]

[Table 6] From the results in Table 3, Sample 1 (Comparative) had low sensitivity, high gradation, and poor sharpness. On the other hand, the sample of the present invention was produced, and all of the sensitivity, shadow depiction, and sharpness were excellent.

Example 3 Samples 1, 10 and 11 of Example 1 were each exposed to red light and evaluated for sensitometry and sharpness in the same manner as in Example 1. The results are shown in Table 4, and the same results as in Example 1 were obtained.

[0119]

[Table 7]

[0120]

As described above, in the silver halide photographic material of the present invention, the amount of white pigment particles in the polyolefin resin coating layer, the surface roughness of the coating layer, and the silver chloride content of the photographic emulsion layer By using two or more kinds of monodispersed silver halide emulsions having different sensitivities, a silver halide photographic material having high sensitivity, excellent gradation reproducibility and sharpness and suitable for rapid processing can be obtained. Was completed.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03C 1/79 G03C 1/035

Claims (1)

(57) [Claims] 1. A white pigment comprising a paper substrate and a polyolefin resin coating layer covering both surfaces of the substrate, wherein a white pigment is applied to a layer of the two polyolefin resin coating layers on which a photographic emulsion layer is coated. The particles are contained in the polyolefin resin layer at a density of 13% by weight or more, and the surface of the layer has a center plane average roughness (SR) of 0.14 μm or less.
a) wherein SRa is calculated by the following formula (I) , and at least one layer on the support
mol% or more and two or more monodisperse silver halide emulsions having different sensitivities, and the difference in sensitivity between the emulsions is 0.0 %.
A silver halide photographic light-sensitive material characterized by having a logarithm of 5 to 0.6 logE . Formula [I] Wherein, Lx represents a X-axis direction length of the sample surface area, Ly represents the Y-axis direction length of the sample surface area, S _M represents the area of the sample surface area. ]